British motorcycle manufacturers - M

Mabon	1905
Macklum	1920-22. Scooters.
Majestic	A subsidiary of OK Supreme started in 1931 using equipment purchased from the recently sold AJS. Made bikes only in 1933. Closed in 35.
Marloe	1920-22
Marlow	1920-22
Mars	1905-08 and 1923-26
Marseel	1920-21
Martin	1911-22
Martin-Comerford	1930. Dirt-track (speedway) machine, used specialized JAP engine. Also known as Martin-JAP and Martin-Rudge.
Martinshaw	1923-24 (1923-26?). Twickenham.
Martinsyde	1919-25. Bought by BAT.
Marvel-JAP	1909-12
Mason & Brown	1904-08
Massey	1920-31
Massey-Arran	1920-24
Matador	German firm, bikes designed by Bert Houlding, used Blackburne or Bradshaw engines. Also made Toreador.
Matchless	See also AJS. Founded in 1899 by the Collier family father H. H. and brothers Charlie and Harry. Started with a tricycle in 1904, moved to a JAP-powered V-twin in 1905. It also boasted a swing-arm rear suspension and leading-links forks. Charlie won the inaugural TT race in 1907, Harry won in 1909 and Charlie again in 1910. Singles were their main bike, but they also made V-twins from 496 to 998cc.They decided to make their own engines from 1912 on. Matchless engines were considered excellent, and were supplied to Brough Superior, Morgan cars, Coventry Eagle and others. Matchless did not receive a contract to make motorcycles during WW!, and production started up with civilian machines in 1919, concentrating on V-twins for sidecar use, leaving singles until 1923. The company went public in 1926. In 1930 they launched a narrow-angle 400cc V-twin called the Silver Arrow, with many new features and design ideas, and in 1931 they launched a revolutionary 593cc V-four called the Silver Hawk. In 1931 they bought AJS from the Stevens brothers, and Sunbeam in 1936 (1938? selling it to BSA shortly after). This merger became Associated Motor Cycles - AMC - in 1938 which later absorbed Francis-Barnett, James and Norton. In 1941 the made motorcycles with telescopic front forks called "Teledraulic" forks, the first major innovation in front suspension in 25 years. During WW2, Matchless made 80,000 G3 and G3L models for the armed forces. Matchless introduced its first parallel twin in 1948 (Model 20 and G9). By 1956 they had eight models in their lineup, but it dwindled in 1965. In 198 they introduced a line of lightweight AMC singles. AMC collapsed in 1967, although the last matchless machine was the 748cc G15 (AJS Model 33) which used the Norton Atlas engine, and was made until 1969.
Maxim	1919-21
May Brothers	1903-06.
MCC	1903-10. London.
McEvoy	1926-29. Derby.
McKechnie	1921-22
McKenzie	1921-25 . Featherweight bikes with a 169cc two-stroke Hobart engine, weighing only 80 lb (32.6 kg). More like a motorized bicycle.
Mead	1911-16. Liverpool.
Mercury	Started in 1937 using 596cc Scott engines, but only built five bikes before it closed in the war. The name was revived by another company after WW2 to make a moped and scooter. In 1956-57 they added three small motorcycles, but closed in 1958.
Metro	1912-19
Metro-Tyler	1919-23. Tyler Apparatus Co. took over Metro in 1919 and merged names.
Midget Bicar	1942-12
Millionmobile	1902-03.
Mini-Motor	1949-55. Clip on engines.
M&M	1914
Mohawk	1903-25
Monarch	1919-21
Monopole	1911-28 (1902-27?)
Montgomery	Founded in 1902, it continued until WW2 making a series of well-made but expensive bikes ranging from 150cc to 1,000cc. They used Villiers and JAP engines.  Fired interrupted production in 1925. Their 1930s Greyhound was a JAP-powered 500cc bike capable of 75mph. Closed in 1940.
Moonbeam	1920.
Morris	1902-05 and another company 1913-22. First company founded by William Morris, later a car manufacturer.
Morris-Warne	1921-22
Morton-Adam	1923-24 (1923-26?)
Motorped	1920-22.
Mountaineer	1902-26 (1920-24?). Only one model after WWI.
Moveo	1907
MPH	1920-24